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Search: id:A136724
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| A136724 |
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Numbers divisible by 4 which are not power of 2. |
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+0
2
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| 12, 20, 24, 28, 36, 40, 44, 48, 52, 56, 60, 68, 72, 76, 80, 84, 88, 92, 96, 100, 104, 108, 112, 116, 120, 124, 132, 136, 140, 144, 148, 152, 156, 160, 164, 168, 172, 176, 180, 184, 188, 192, 196, 200, 204, 208, 212, 216, 220, 224, 228, 232, 236, 240, 244, 248
(list; graph; listen)
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OFFSET
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1,1
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COMMENT
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Primitive dimensions of Hadamard matrices which cannot be obtained as tensor powers of the primitive matrix 2 X 2 {{1,1},{1,-1}}
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MATHEMATICA
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a = {}; Do[k = 4n; If[Round[Log[k]/Log[2]] == Log[k]/Log[2], [null], AppendTo[a, k]], {n, 1, 100}]; a
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CROSSREFS
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Cf. A007299.
Sequence in context: A075078 A050421 A065201 this_sequence A112769 A097320 A111592
Adjacent sequences: A136721 A136722 A136723 this_sequence A136725 A136726 A136727
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KEYWORD
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nonn
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AUTHOR
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Artur Jasinski (grafix(AT)csl.pl), Jan 19 2008
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